Quantcast KVCD: Clean Slight Interlacing? - digitalFAQ.com Forums [Archives]
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12-19-2002, 02:40 PM
m0rdant m0rdant is offline
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I've been playing around with Iron Giant for about a week now, trying different KVCD templates ect for a nice one disc encode.

I'm getting very good results with the KVCDx3 mpeg 2 set at 480x480. I'm using the TMPGenc resize/masing discussed in the "crap" msgs =) along with the 1/12/2/1/24 gop structure. I played with the 704x480 and 528x480 settings...I liked the sharpness, but doesn't seen needed with an animated film...and I wanted a smoother picture so I went with the 480x480.

I used the NoMoSmooth filter (blockbuster didnt' seem to help with this cartoon) I used the prediction formula and came out a little short on the final encode, so I redid sound at 192 and now have almost filled the 800 meg CD. I got a CQ-VBR of 14, but I think if I had used the .81 instead I might have got a higher number...

...anyway, all that is just background for anyone interested...

My question/problem is that even though I used Force Film in DVD2AVI a few frames still show some interlacing. Just a few from time to time. Is there a filter I can apply to remove these last little bits?

Thanks for any help.

Things are looking really good with KVCD these days Kwag!

I drift away to standard SVCDs and keep getting pulled back with each new advance you make here.
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12-19-2002, 02:49 PM
kwag kwag is offline
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Hi m0rdant,

Try 0.89 for the prediction factor or 11 if you're using SansGrip KVCD Predictor. These numbers are not final. They're still under test, but seem to target the final size very accurately. More info later today when I finish two encodes.

-kwag
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12-19-2002, 03:01 PM
m0rdant m0rdant is offline
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I will try that .89 if I'm going to re-encode...but I only want to do that right now if there is a way to get rid of the few spots of interlacing (black lines). If there isn't I'll just let this encode be as is because it came out very nicely as is.
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12-19-2002, 03:08 PM
heyitsme heyitsme is offline
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Well you can try bob()
I put it before the resizing line. This should help with the interlacing. Works for me. Hope it works for you.

Oh yeah it will change the fps to double what your movie is. So just change it back in your template.
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12-19-2002, 04:19 PM
SansGrip SansGrip is offline
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Quote:
Originally Posted by m0rdant
My question/problem is that even though I used Force Film in DVD2AVI a few frames still show some interlacing. Just a few from time to time. Is there a filter I can apply to remove these last little bits?
I find that force film mode doesn't work well except for totally 100% telecined material. Recently instead of struggling with it I've been leaving force film off and using Donald Graft's Decomb package to do the IVTC. Decomb is almost always able to catch those stray interlace artifacts.
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12-19-2002, 04:24 PM
kwag kwag is offline
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Quote:
Originally Posted by SansGrip
I find that force film mode doesn't work well except for totally 100% telecined material. Recently instead of struggling with it I've been leaving force film off and using Donald Graft's Decomb package to do the IVTC. Decomb is almost always able to catch those stray interlace artifacts.
I've noticed the effect, but only in a couple of films. I use this in my .avs file, mostly on animated films:

Telecide()
Decimate()

And it makes wonders

@SansGrip:

Do you use these filters as default (as above), or do you have other prefered settings?

-kwag
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12-19-2002, 05:09 PM
m0rdant m0rdant is offline
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If I'm going to use Telecide Decimate or the Decomb filter do I still use Force Film?

Interlacing is where I get very dumb =)

I'm retrying Iron Giant with DVD2SVCD this time. I put in the new gop ect...and changed the prediction factor to .89

I'm not using the TMPGenc clip/mask this time because of DVD2SVCD, so I'm using Bilinear Resize from a fitCD script.

When I did it manually with a CQ-VBR of 14 it came out at around 720megs with 128 bit sound...DVD2SVCD has calculated 13.89 with these settings. Actually I notice in the log file it says "Final CQ Value: 15.61" but then goes on to use 13.89 in the encode. Is that normal?

Thanks again for any help.
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12-19-2002, 05:20 PM
SansGrip SansGrip is offline
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Quote:
Originally Posted by kwag
I've noticed the effect, but only in a couple of films. I use this in my .avs file, mostly on animated films:

Telecide()
Decimate()
Of course, you would only use Decimate with force film mode off, otherwise both mpeg2dec and decomb will be decimating, with undesirable consequences.

Quote:
Do you use these filters as default (as above), or do you have other prefered settings?
I try to use defaults whenever possible . I only start tinkering if I notice that the defaults aren't working (very unusual).
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12-19-2002, 05:22 PM
SansGrip SansGrip is offline
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Quote:
Originally Posted by m0rdant
If I'm going to use Telecide Decimate or the Decomb filter do I still use Force Film?
Nope. Force film mode causes the Mpeg2Source plugin to produce 24fps material already. If you ran Decimate on that, you'd end up with about 19fps .

Quote:
Interlacing is where I get very dumb =)
I find interlacing issues to be one of the most confusing parts of the whole encoding process.
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